batgrbproduct Analysis for Trigger=601928
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Wed Jun 18 03:05:28 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger601928/GCN5_download_cron
======================================================================
Trigger: 00601928 Segment: 000
BAT Trigger Time: 424679864 [s; MET]
Trigger Stop: 424680952 [s; MET]
UTC: 2014-06-17T06:37:31.850420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 324.790430637035 Dec: 56.9534169369178 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.36
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.36
Flight Position: [ source = BAT ]
RA: 324.790430637035 Dec: 56.9534169369178 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 324.765218179972 Dec: 56.9735869192089 [deg; J2000]
{ 21h 39m 03.7s , +56d 58' 24.9" }
+/- 3.39494974223947 [arcmin] (estimated 90% radius based on SNR)
+/- 1.63741902410416 [arcmin] (formal 1-sigma fit error)
SNR: 5.30621720626843
Angular difference between Flight and Ground position is 1.464489 arcmin
Partial Coding Fraction: 0.8984375 [ including projection effects ]
Duration
T90: 1088 +/-
Measured from: 0
to: 1088 [s; relative to TRIGTIME]
T50: 1088 +/-
Measured from: 0
to: 1088 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1088 second)
Measured from: 0
to: 1088 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1088 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.164894 0.725478 0.016146 0.066313
0.175089 0.177431 0.153008 0.131191 [error]
Peak 2.164894 0.725478 0.016146 0.066313
0.175089 0.177431 0.153008 0.131191 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 5.73e-07 3.58e-07 1.44e-07 7.77e-08 1.11e-06 1.15e-06 erg/cm2
Error 8.68e-08 8.76e-08 7.29e-08 7.04e-08 2.18e-07 2.49e-07 erg/cm2
Peak flux Power-law 2.00e-02 7.05e-03 1.41e-03 3.36e-04 2.87e-02 2.88e-02 ph/cm2/s
Error 3.08e-03 1.64e-03 6.97e-04 2.86e-04 4.30e-03 4.35e-03 ph/cm2/s
Fluence Cutoff-PL 6.26e-07 3.15e-07 5.20e-09 1.56e-13 9.46e-07 9.46e-07 erg/cm2
Error 9.91e-08 1.22e-07 2.66e-08 4.09e-10 1.61e-07 1.61e-07 erg/cm2
Peak flux Cutoff-PL 2.13e-02 6.70e-03 6.16e-05 9.73e-10 2.80e-02 2.80e-02 ph/cm2/s
Error 3.44e-03 2.32e-03 2.89e-04 2.39e-06 4.07e-03 4.07e-03 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.317 0.421 - - 8.20e-05 3.19e-05 82.960 57
CPL -2.394 5.598 18.6 5.5 2.07e+00 0.00e+00 74.800 56
The chi2 of BB fit is 74.92 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.317 0.421 - - 8.20e-05 3.19e-05 82.960 57
CPL -2.394 5.598 18.6 5.5 2.07e+00 0.00e+00 74.800 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1088.000 0.000 1088.000
T90 1088.000 0.000 1088.000
T50 1088.000 0.000 1088.000
Peak 1088.000 0.000 1088.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
324.7652 +56.9736 0.0360 13.9 118.3 2.9324 5.3 TRIG_00601928
------------------------------------------
Foreground time interval of the image:
0.000 447.855 (delta_t = 447.855 [sec])
449.000 943.300 (delta_t = 494.300 [sec])
944.000 963.090 (delta_t = 19.090 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 447.854700
449.000000 943.300000
944.000000 963.090000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.31748 ( -0.390801 0.452125 )
Norm@50keV : 8.20149E-05 ( -2.9533e-05 3.43187e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.96 using 59 PHA bins.
# Reduced chi-squared = 1.455 for 57 degrees of freedom
# Null hypothesis probability = 1.399664e-02
Photon flux (15-150 keV) in 961.2 sec: 2.86756E-02 ( -0.0042915 0.00431158 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11434e-06 ( -2.08808e-07 2.26825e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 447.854700
449.000000 943.300000
944.000000 963.090000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.39413 ( -8.53689 2.65866 )
Epeak [keV] : 18.6150 ( -6.54975 4.52081 )
Norm@50keV : 2.06719 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.80 using 59 PHA bins.
# Reduced chi-squared = 1.336 for 56 degrees of freedom
# Null hypothesis probability = 4.734928e-02
Photon flux (15-150 keV) in 961.2 sec: 2.80186E-02 ( -0.0040597 0.0040829 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.45981e-07 ( -1.53034e-07 1.68069e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 447.854700
449.000000 943.300000
944.000000 963.090000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.49443 ( -2.94803 -2.42583 )
beta : -6.23216 ( 6.18694 2.48489 )
Epeak [keV] : 19.2048 ( -2.66138 2.46712 )
Norm@50keV : 15.8200 ( -15.0201 114.692 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.66 using 59 PHA bins.
# Reduced chi-squared = 1.357 for 55 degrees of freedom
# Null hypothesis probability = 4.001758e-02
Photon flux (15-150 keV) in 961.2 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.60594 (-0.593735 0.675537)
R^2/D10^2 : 0.373313 (-0.180058 0.365957)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.92 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 57 degrees of freedom
# Null hypothesis probability = 5.593687e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.210e-07 2.110e-07
25- 50 3.294e-07 1.208e-07
50-150 8.856e-09 6.854e-09
15-150 9.593e-07 2.520e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.0645 (-3.09846 4.46194)
Norm : 0.617479 (-0.205981 0.368728)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.66 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.579044e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.017e-07 1.391e-07
25- 50 3.579e-07 1.284e-07
50-150 4.742e-08 3.336e-08
15-150 1.007e-06 2.614e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.60437 (-1.14221 0.672978)
R1^2/D10^2 : 0.373514 (-0.179548 0.563109)
kT2 [keV] : 199.096 (-198.954 -198.954)
R2^2/D10^2 : 1.38617E-07 (-1.47925e-07 0.737655)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.89 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 55 degrees of freedom
# Null hypothesis probability = 3.849402e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.206e-07 1.835e-07
25- 50 3.302e-07 1.215e-07
50-150 4.404e-08 6.720e-09
15-150 9.949e-07 2.660e-07
Peak spectrum fit
Power-law model
Time interval is from 944.000 sec. to 963.090 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.31748 ( -0.390801 0.452125 )
Norm@50keV : 8.20149E-05 ( -2.9533e-05 3.43187e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.96 using 59 PHA bins.
# Reduced chi-squared = 1.455 for 57 degrees of freedom
# Null hypothesis probability = 1.399664e-02
Photon flux (15-150 keV) in 961.2 sec: 2.86756E-02 ( -0.0042915 0.00431158 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11434e-06 ( -2.08808e-07 2.26825e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 944.000 sec. to 963.090 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.39413 ( -8.53689 2.65866 )
Epeak [keV] : 18.6150 ( -6.54975 4.52081 )
Norm@50keV : 2.06719 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.80 using 59 PHA bins.
# Reduced chi-squared = 1.336 for 56 degrees of freedom
# Null hypothesis probability = 4.734928e-02
Photon flux (15-150 keV) in 961.2 sec: 2.80186E-02 ( -0.0040597 0.0040829 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.45981e-07 ( -1.53034e-07 1.68069e-07 ) ergs/cm2
Band function
Time interval is from 944.000 sec. to 963.090 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.49443 ( -2.94803 -2.42583 )
beta : -6.23216 ( 6.18694 2.48489 )
Epeak [keV] : 19.2048 ( -2.66138 2.46712 )
Norm@50keV : 15.8200 ( -15.0201 126.101 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.66 using 59 PHA bins.
# Reduced chi-squared = 1.357 for 55 degrees of freedom
# Null hypothesis probability = 4.001758e-02
Photon flux (15-150 keV) in 961.2 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.60594 (-0.593735 0.675537)
R^2/D10^2 : 0.373313 (-0.180058 0.365957)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.92 using 59 PHA bins.
# Reduced chi-squared = 1.314 for 57 degrees of freedom
# Null hypothesis probability = 5.593687e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.210e-07 1.643e-07
25- 50 3.294e-07 1.038e-07
50-150 8.856e-09 6.837e-09
15-150 9.593e-07 2.637e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.0645 (-3.09846 4.46194)
Norm : 0.617479 (-0.205981 0.368728)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.66 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 57 degrees of freedom
# Null hypothesis probability = 3.579044e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.017e-07 1.574e-07
25- 50 3.579e-07 1.214e-07
50-150 4.742e-08 3.366e-08
15-150 1.007e-06 2.475e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.60437 (-1.27795 0.673013)
R1^2/D10^2 : 0.373514 (-0.179548 0.562766)
kT2 [keV] : 199.096 (-198.954 -198.954)
R2^2/D10^2 : 1.38617E-07 (-1.47925e-07 0.737655)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.89 using 59 PHA bins.
# Reduced chi-squared = 1.362 for 55 degrees of freedom
# Null hypothesis probability = 3.849402e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.206e-07 1.796e-07
25- 50 3.302e-07 1.134e-07
50-150 4.404e-08 7.271e-09
15-150 9.949e-07 2.650e-07
Plot creation:
Wed Jun 18 03:09:47 EDT 2014